Effect of film thickness on the properties of bismuth iodide perovskite film for solar cell application

Methylamionium iodo bismuthate (MBI) perovskite is a promising alternative of hybrid organic-inorganic lead perovskite devices because of its better stability and low toxicity compared to lead based perovskite. Spray deposition technique was used to deposit lead free Bismuth Iodide Perovskite thin film with different thickness. The crystal structure of the MBI perovskite was determined from X-ray diffraction measurement. The diffraction peaks well matched with the literature values, which were solved in the P63/mmc space group. The optical absorption measurement showed the absorption band around 500 nm in all the samples. The higher absorption due to increasing the thickness of the perovskite films. The film roughness is decreased with increasing the film thickness. The power conversion efficiency corresponding to best spray deposited lead free perovskite film is observed 0.06%.Methylamionium iodo bismuthate (MBI) perovskite is a promising alternative of hybrid organic-inorganic lead perovskite devices because of its better stability and low toxicity compared to lead based perovskite. Spray deposition technique was used to deposit lead free Bismuth Iodide Perovskite thin film with different thickness. The crystal structure of the MBI perovskite was determined from X-ray diffraction measurement. The diffraction peaks well matched with the literature values, which were solved in the P63/mmc space group. The optical absorption measurement showed the absorption band around 500 nm in all the samples. The higher absorption due to increasing the thickness of the perovskite films. The film roughness is decreased with increasing the film thickness. The power conversion efficiency corresponding to best spray deposited lead free perovskite film is observed 0.06%.